<!DOCTYPE html>
<html>
<style>
  .item {
    float: left;
    width: 31%;
    padding-top: 31%;
    margin:1%;
    border-radius: 10%;
    background-color: orange;
  }
</style>

<body>
  <div class="box">
    <span class="item"></span>
    <span class="item"></span>
    <span class="item"></span>
    <span class="item"></span>
    <span class="item"></span>
    <span class="item"></span>
    <span class="item"></span>
    <span class="item"></span>
    <span class="item"></span>
  </div>
</body>

</html>